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kupik [55]
3 years ago
6

at the store a package of four AA batteries cost $3.92 a package of 8 of the same batteries cost $7.60. what packet is better to

buy? justify your answer​
Mathematics
1 answer:
xz_007 [3.2K]3 years ago
7 0

Let's see how much it would cost for 8 batteries by each package

1) 3.92 x 2 = 7.84

2) 7.60

the second package as it would be much cheaper

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1500 + 0.45x < 1.70x
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8 0
3 years ago
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A person on a runway sees a plane approaching. The angle of elevation from the runway to the plane is 11.1° . The altitude of th
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Answer:

The horizontal distance from the plane to the person on the runway is 20408.16 ft.

Step-by-step explanation:

Consider the figure below,

Where AB represent altitude of the plane is 4000 ft above the ground , C represents the runner.  The angle of elevation from the runway to the plane is 11.1°

BC is the horizontal distance from the plane to the person on the runway.

We have to find distance BC,

Using trigonometric ratio,

\tan\theta=\frac{Perpendicular}{base}

Here, \theta=11.1^{\circ} ,Perpendicular AB = 4000

\tan\theta=\frac{AB}{BC}

\tan 11.1^{\circ} =\frac{4000}{BC}

Solving for BC, we get,

BC=\frac{4000}{\tan 11.1^{\circ} }

BC=\frac{4000}{0.196} (approx)

BC=20408.16(approx)  

Thus, the horizontal distance from the plane to the person on the runway is 20408.16 ft

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3 years ago
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Answer:

........ It's C. ............

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